Your browser version may not work well with NCBI's Web applications. More information here...
1: Proc Natl Acad Sci U S A. 1977 Nov;74(11):5088-90.Click here to read Links

Phylogenetic structure of the prokaryotic domain: the primary kingdoms.

Woese CR, Fox GE.

A phylogenetic analysis based upon ribosomal RNA sequence characterization reveals that living systems represent one of three aboriginal lines of descent: (i) the eubacteria, comprising all typical bacteria; (ii) the archaebacteria, containing methanogenic bacteria; and (iii) the urkaryotes, now represented in the cytoplasmic component of eukaryotic cells.

PMID: 270744 [PubMed - indexed for MEDLINE]

PMCID: PMC432104